From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-20.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 799FEC64981 for ; Mon, 19 Jul 2021 16:26:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5F7FC6146B for ; Mon, 19 Jul 2021 16:26:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235215AbhGSPps (ORCPT ); Mon, 19 Jul 2021 11:45:48 -0400 Received: from mail.kernel.org ([198.145.29.99]:52768 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344332AbhGSO7e (ORCPT ); Mon, 19 Jul 2021 10:59:34 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id DF6F16124C; Mon, 19 Jul 2021 15:39:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626709184; bh=RG9t+dyDgK2lFFy1wsx1GkKwscFAG0qF4DvGZutVgK0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=e5gTEtMTvrtwjYYkv/zWUTJ59Cacm8+zabVWB9WONyjqkxTBUGqar2cOl/uwtzqcd rHFUhkuUA5T5XVDm7jYP3gVUtjZQasN9a9FJfMaVO+6rUUB3uynIy10V96bE+LaGf8 Gd3D5UlTT14ykHWVr4HK3t20Woc8+iq1aviS1abo= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Anatoly Trosinenko , Miklos Szeredi Subject: [PATCH 4.19 283/421] fuse: reject internal errno Date: Mon, 19 Jul 2021 16:51:34 +0200 Message-Id: <20210719144956.156457683@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210719144946.310399455@linuxfoundation.org> References: <20210719144946.310399455@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Miklos Szeredi commit 49221cf86d18bb66fe95d3338cb33bd4b9880ca5 upstream. Don't allow userspace to report errors that could be kernel-internal. Reported-by: Anatoly Trosinenko Fixes: 334f485df85a ("[PATCH] FUSE - device functions") Cc: # v2.6.14 Signed-off-by: Miklos Szeredi Signed-off-by: Greg Kroah-Hartman --- fs/fuse/dev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/fs/fuse/dev.c +++ b/fs/fuse/dev.c @@ -1896,7 +1896,7 @@ static ssize_t fuse_dev_do_write(struct } err = -EINVAL; - if (oh.error <= -1000 || oh.error > 0) + if (oh.error <= -512 || oh.error > 0) goto err_finish; spin_lock(&fpq->lock);